A person of weight $70 k g$ , a stone of weight $1 k g$ and a paper of weight $10 g$ start falling at the same time on the earth from a height of $100 f t$ . If the air resistance is neglected, which of the following will reach the earth first?

Person

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Stone

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Paper

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All will reach the earth at the same time

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Solution

The correct option is D All will reach the earth at the same time
Free falling objects fall with a constant acceleration called the acceleration due to gravity $(g = 9.81 m s^{- 2}$ on earth). Since air resistance is neglected, all the bodies will be in a state of free fall.

Therefore, the person, stone and paper will reach the earth in the same time.

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